Digital Myxoid Cyst
A digital myxoid cyst (sometimes called a mucous cyst) is an entirely benign swelling that occurs on the fingers or, sometimes, the toes. The term cyst is from the Greek kystis meaning a bag or pouch; myxoid and mucoid refer to the jelly-like or slimy contents; and digital derives from the Latin digitus, meaning finger or toe.
Digital myxoid cysts are skin-coloured, reddish or slightly translucent (letting light shine through), and often dimple when pressed. If it is overlying the area where the nail is formed, a cyst may cause a groove to occur along the length of the nail, which can vary in width. Occasionally, slightly sticky, clear, straw-coloured or blood-stained contents may leak out of the cyst, and it may become crusted. Usually, there is just one cyst, but some people may develop more than one, on different fingers.